5 C.F.R. § 9701.517
(a) For the purpose of this subpart, it is an unfair labor practice for the Department—
(b) For the purpose of this subpart, it is an unfair labor practice for a labor organization—
(7)
(g) The expression of any personal view, argument, opinion, or the making of any statement which publicizes the fact of a representational election and encourages employees to exercise their right to vote in such an election, corrects the record with respect to any false or misleading statement made by any person, or informs employees of the Government's policy relating to labor-management relations and representation, may not, if the expression contains no threat of reprisal or force or promise of benefit or was not made under coercive conditions—